Great host - Sudarat was solve our aircon problem immediaty at first day and she and her crews are very friendly and helpful, having wonderful light breakfast in their cozy lobby aka cafe.
From HEYYYY is about 5-10mins walking distance to ARL Hua Mak and can transfer to bts or mrt line just few stops.
(MRT is great and not so crowded, some personal tips here using MRT line you can go Chatuchak Park for weekend market, Thailand Cultural Centre for RoiFai Train Market, and you can go Lumphini station nearby Guss Damn Good ice cream shop craving their amazing ice cream)